Transmission Fluid Pressure Sensor/Switch B Circuit Intermittent

Where it lives

For P0849, the sensor sits on the circuit this code reports. The description of P0849 reports a fault at the sensor.

Check these first

• A sensor B connector that loses contact when hot
• Chafed wiring along the sensor B run
• A sensor B that drops out when warm
• Debris in the transmission fluid
• A ground that opens when warm

What to do next

1. Road test and watch sensor B pressure
2. Wiggle test the sensor B wiring and connector
3. Check the fluid level and condition
4. Reread sensor B while hot
5. Replace sensor B if the signal cuts out
6. Clear the code and retest

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